package cn.z.ping;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Ping2 {
	private static Pattern pattern = Pattern.compile("(\\d+ms)(\\s+)(TTL=\\d+)", Pattern.CASE_INSENSITIVE);
	private static void ping01(String ipAddress) throws Exception {
		//超时应该在3钞以上
		int timeOut = 5000;
		if (InetAddress.getByName(ipAddress).isReachable(timeOut)) {
			System.out.println(ipAddress);
		}else{
			System.err.println(ipAddress);
		}
	}
	private static void ping02(String ipAddress) throws Exception {
		String line = null;
		try {
			Process pro = Runtime.getRuntime().exec("ping " + ipAddress);
			BufferedReader buf = new BufferedReader(new InputStreamReader(pro.getInputStream()));
			while ((line = buf.readLine()) != null) {
				System.out.println(line);
			}
		}
		catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
	}
	private static void ping03(String ipAddress, int pingTimes, int timeOut) {
		BufferedReader in = null;
		// 将要执行的ping命令,此命令是windows格式的命令
		Runtime r = Runtime.getRuntime();
		String pingCommand = "ping " + ipAddress + " -n " + pingTimes + " -w " + timeOut;
		try {   // 执行命令并获取输出
			System.out.println(pingCommand);
			Process p = r.exec(pingCommand);
			if (p != null) {
				// 逐行检查输出,计算类似出现=23ms TTL=62字样的次数
				in = new BufferedReader(new InputStreamReader(p.getInputStream()));
				int connectedCount = 0;
				String line = null;
				while ((line = in.readLine()) != null) {
					connectedCount += getCheckResult(line);
				}   // 如果出现类似=23ms TTL=62这样的字样,出现的次数=测试次数则返回真
				System.out.println(connectedCount == pingTimes);
			}
		}
		catch (Exception ex) {
			ex.printStackTrace();   // 出现异常则返回假
		}
		finally {
			try {
				if (in != null) {
					in.close();
				}
			}
			catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	/**
	 * 若line含有=18ms TTL=16字样,说明已经ping通,返回1,否則返回0.
	 */
	private static int getCheckResult(String line) {
		// System.out.println("控制台输出的结果为:"+line);
		Matcher matcher = pattern.matcher(line);
		while (matcher.find()) {
			return 1;
		}
		return 0;
	}
	public static void main(String[] args) throws Exception {
		String ipAddress = "127.0.0.1";
		// System.out.println("-------------------------------");
		// ping01(ipAddress);
		// System.out.println("-------------------------------");
		// ping02(ipAddress);
		// System.out.println("-------------------------------");
		// ping03(ipAddress, 5, 10000);
		// System.out.println("-------------------------------");
		for (int i = 0; i <= 255; i++) {
			ping01("192.168.1." + i);
		}
	}
}